ESA - Eduspace PT - Mudança Global - A dinâmica dos glaciares

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Desflorestação

Parque Nacional de Bardia Bacia do Rio Congo Kameng-Sonitpur Kilimanjaro Rondónia Shillong e Guwahati

Ice

Análise de glaciares utilizando imagens de radar Expedição à Antárctida Alterações climáticas e glaciares Recuo dos glaciares nos Alpes Fluxo de gelo glaciar Monitorização de glaciares nos Himalaias Deteção remota de gelo e neve

Urbanização

Cairo Catmandu Córdoba Himalaias Vale de Catmandu Lagos

Vegetação

Área de Conservação de Annapurna Perdidos nos Andes!Área de Conservação de Ngorongoro Delta Interior do Níger Vegetação da América do Sul

Article Images

A dinâmica dos glaciares

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Scheme of ice flow from the accumulation to the ablation area

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Scheme of ice flow from the accumulation to the ablation area. Snow that falls on the highest zones of a glacier has the longest and deepest travel path. It emerges again at the lowest point of the glacier tongue and is the oldest ice. Depending on the size and flow-speed of a glacier, the travel time of a snow and ice crystal from the accumulation area to the glacier tongue can take from tens to hundreds of years.

Credits: Andreas Kääb

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ASTER satellite image of 29 May 2002 showing glaciers in the Himalayas, at the border between Bhutan and Tibet (see GoogleEarth file location 1.6). Although this area lies in the subtropics, the glaciers survive. Ice flow transports the ice masses that develop around the cold, snow-rich mountain peaks to the warmer valleys, where it compensates for the intense ice melt.

Credits: NASA/ GSFC/METI/ERSDAC/JAROS, and the US/Japan ASTER science team

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Animation of two ASTER satellite images of the glacier

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Animation of two ASTER satellite images of the glacier in the ASTER image. The images are from spring and late autumn 2001. Do you see the glacier flow?

Credits: NASA/ GSFC/METI/ERSDAC/JAROS, and the US/Japan ASTER science team

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Close-up of animation

Credits: NASA/ GSFC/METI/ERSDAC/JAROS, and the US/Japan ASTER science team

Fluxo de gelo glaciar

Introdução

Informação de Base

Correlação de imagens multitemporais

Exercícios

Introdução aos exercícios Exercício 1 (utilizando o LEOWorks 3)

Eduspace - Software

LEOWorks 3

Eduspace - Download

ASTER.zip GoogleEarth file